Drinking mug



FIG. 1 is a top, front, and left end perspective view of a drinking mug showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a bottom plan view;

FIG. 4 is a front elevational view;

FIG. 5 is a rear elevational view; and

FIG. 6 is a left end elevational view thereof, the end opposite is a mirror image thereof. 

The ornamental design for a drinking mug, as shown and described. 